Portable fluid segregating apparatus



Aug.. I, 1939. I I D sAMlRAN '2,167,682

PORTABLE FLUID SEGREGATING APPARATUS lNl/ENTOR Aug. 1, 1939. D SM1/RAN2,167,682

PORTBLE FLUID SEGREGATING APPARATUS Filed Jan. e, 1937 '7 sheets-sheet 2Nlf/*INTUR 7,4 1//0 SAM/PAN Aug l, 1939 K D. sAMlRAN 2,167,682

PORTABLE FLUID SEGREGATING APPARATUS I Fild'Jan. 8, 1937 7 Sheets-Sheet3 Aug. l, 1939. D. SAMIRAN I v 2,167,632

PORTABLE IFLUD SEGREGATING APPARATUS Filed Jan. 8, 1957 7 sheets-sheet 4LTU/26 A25/"TIT f' I I I I l I I @I Xi M ufmnf I.

Aug. 1, 1939.

D. SAMIRAN PORTABLE FLUID SEGREGATING APPARATUS Filed Jax-1. 8, 1957 '7Sheets-Sheet 5 INI/ENTOR Aug. 1, 1939. D. sAMlRAN PORTABLE FLUIDSEGREGATING APPARATUS Fiied Jan. 8, 1957 7 Sheets-Sheet 6 IN VEN T ORSAM/@4N "naL Aug. 1, 1939. D. sAMiRAN 2,167,682'

l PORTABLE FLUID' SGREGATING APPARATUS Filed Jan. 8,-193'7 '7Sheets-Sheet 7 INI/ ENTOR 0,4%/ 4M/@4N B Y Patentedv Aug. 1 1939`PORTABLE FLUID SEGREGATING APPARATUS Davia suman, Dayton, om

Application January 8,

17 Claims.

1937, Serial No. 119,643

(Granted under the act of March 3, 1883, as amended April 30, 1928; 3700. G. 757) segregators `for the automatic segregation and/or i isolationo-f fluids of different specic gravities, and more particularly to forcefeed segregators in which a separation of non-miscible fluids of dif- 10ferent specic gravities is obtained.

The present invention is especially adapted to the segregation of fluidsin which the source of the supply is readily accessible, as in the caseof commercial drums of a mobile character, which, 15 from theirparticular nature, necessitate removal on numerous occasions from placeto place. Such an arrangementis not only essential in warehouses for thestorage of gasoline or other liquids in drums, but particularlydesirable from a Q military standpoint in times of War, where supplydumps are established at strategic points and the exigencies of theoccasion may require not only arapid evacuation or redistribution ofsupplies to diierent and other points at a mo- 25 ments notice, butrequire equipment of a readily portable nature that may be carried withthe servicing crews. Especially is this true in the case of militaryflying elds where the nature of the service to be performed requiresovernight 30 transportation to a new base of operation, not only offlying equipment but also ofthe servicing equipment of .the ground crew.

To this end, one of the primary objects of the present invention is toprovide a portable fluid 35 segregatingand dispensing apparatus of auntary structure embodying a carrier which permits of the loading andcarrying of -fuel receptacles; and in which fuels of different specificgravities contained within said receptacles may be readily I 40segregated and dispensed while loaded on said carrier. y Y

A further4 object ofthe present invention is to provide a portable fuelservicing truck of novel construction; one whichis collapsible when notLolii in use; one which is readily attachable to a fuel receptacle priorto the loading of the receptacle thereon, said truck being soconstructed and arranged as to permit swinging or tumbling of the fuelreceptacle and truck into operative position 50 for carrying and/ordispensing fluid with a minimum of effort on the part of the operator.

A. further object of the present invention is to provide in aY truck ofthis character, a built-in fluid segregating apparatus which is whollydis- 55 posed within the umn-.s defined by lune length and breadth ofthe truck, said fluid segregatng apparatus incorporating Iiuid impellingmeans, and a liuid segregator interposed between the fuel receptacle andimpelling means for automatically effecting a separation of theundesirable com- 5 ponents from the fluid prior to its passage throughthe impelling means, and immediately after it leaves the fuelreceptacle; to provide in a servicing truck incorporating means foreffecting a segregation of uids of different specic gravities, fluidimpelling means, and means forming a part of said fluid impelling meansfor creating suction effects in said segregator, said last mentionedmeans being so constructed and arranged that the vacuum established insaid segregator means by operation of said impelling means, ismaintained to permit allow of the fluid from said fluid segregator aslong as said impel1 ing means is in operation, said impelling meansincluding additional means for destroying the suction effects when saidimpelling means is inoperative 4and thereby obtain an intermittentsegregation of fluid; to provide a segregator having a float operatedneedle valve and means cooperating wlth said valve to control the flowof fluid into and out of the float chamber.

A still further object of the present invention is to provide in adispensing apparatus of this character, suction impelling means, a fluidsegregator incorporating a float controlled valve mechanism forcontrolling the passage of undesirable fluid into said impelling means,and pressure ,responsive means controlled by the suction effects of saidimpelling means for destroying said suction should said valve mechanismfail to respond and thereby prevent the undesirable liquid from reachingsaid impelling means.

A still further object of the present invention is to provide a unitarydispensing unit of comgpact form incorporatingV a fluid segregator forthe isolation of uids oi different specific gravities, said unit beingreadily attachable' to a fuel drum of standard construction by means ofa single servicingcoupling which latter incorporates a minimum ofoperating parts.

With these and other objects in view, the invention consists in thenovel' arrangement and combination of parts, all of which will beparticularly pointed out and afterwards dened in 50 the amended claims.

In`the drawings Figure 1 is a side elevation of the truck in invertedposition upon a fuel Figure 2 is a view illustrating the truck with 55the drum attached and swung into a servicing position.

Figure 3 is a front elevation of the truck with fuel drum removed.

Figure 4 is a top plan view of the servicing truck with the drumattached.

Figure 5 is a View of the truck per se, in folded position.

Figure 6 is an enlarged detail view, partly in section, of the lockingmechanism for the folding portion of the truck.

Figure 7 is a vertical sectional view of the segregator mechanism andthe coupling for attachment of the same to a fuel drum.

Figure 8 is a part detail view of the lower portion of the segregatorillustrated in Figure 7.

Figure 9 is a part sectional view of thefuel pump and suction controlmechanism.

Figure 10 is an enlarged vertical sectional View of the floatoperatedontrol mechanism generally illustrated in Figure 9.

Figure 11 is a part sectional view of the fuel pump operating handle.

Figure 12 is a front elevation of Figure 11.

Figure 13 is an enlarged side elevation of a clamping device for holdingthe fuel drum on the Servicing truck.

Figurel4 is a top plan view of Figure 13.

Figure 15 is an enlarged sectional view of the dispensing nozzle used inmy invention.

Figure 16 is a sectional view taken on the line Iii-I6 of Figure 15.

Figure 17 is a sectional view of a modied form of dispensing nozzle andFigure 18 is an enlarged detail sectional view of the telescopinghandles of the fuel truck.

Referring more particularluy to the drawings wherein corresponding partsare designated by.

like numerals throughout the several views, the apparatus in one of thepresent preferred embodiments of my invention herein illustratedgenerally Acomprises a truck body portion A, a segregating anddispensing mechanism B and a source of fluid supply C. l

Ihe truck body portion A comprises a framework of general tubularconstruction and specically includes a. pair of upstanding rockermembers I0 and II, of modied C shape, which are disposed in spacedparallel relationship. 'Ihese rocker members at their upper free endsare suitably bent inwardly to form therebetween an arcuate portion I2,the radius of curvature of which is substantially equal to the adjacentradius of the attaching drum C. At their lower ends the rocker membersare suitably bent to provide horlzontally disposed base forming portionsI3 and continuing laterally disposed bracing portions I4,

forming a partial support for the bottom of the fuel drum, The baseportions I3 are further provided with shoes I3 having serrated loweredges I4 to prevent skidding or slipping of the truck when moving thesame from the position illustrated in Figure 1 to that positionillustrated in Figure 2.

Intermediate the upper and lower ends of the rocker elements I0 and I I,there is positioned inwardly extending tubular brace members I5 and I6which are suitably welded or otherwise flxedly secured at their outerends to the said rocker elements. These brace 'members incorporatelateral arms I'I and I8, the inner of which, identified by the numeralI8,-is of arcuate shape, the radius of curvature of which issubstantially equal to the adjacent radius of the supply drum.Interposed between the arm I3 and the arcuate portion I2 of the rockerelements, I provide a backing plate I9 which is flxedly secured at itslower ends to the arm I8. The upper end of the backing plate embodies astrap 20 which is looped around the upper free ends of the rockerelements I0 and II. This backing plate is provided with a lateralextension 2I having its outer portion, shown at 22, suitably bent toprovide a bearing portion 23, said portion being secured, as by weldingto the one rocker element. A pump 24, forming a part of the dispensingmechanism B, to be hereinafter described in detail, is carried upon thebacking plate.

Each of the brace members l5 and I6 are provided with handles to assistin moving of the truck over the ground when so desired. To this end, Iprovide telescoping tubular sections y and 26, each of which areslidable longitudinally within a companion brace member. These handlesare closed at their outer ends by means of knurled plugs 21 to whichinwardly disposed springs 28 are attached at their outer ends, the innerends of said springs being suitably anchored to stationary bearings 29which are inserted in the inner end of said brace members.

The truck A is provided with running wheels to facilitate transportionover the ground, as shown in Figure 5. The lateral bracing portions I4,heretofore mentioned, have pivotally attached thereto the inner ends ofa wheel mount which incorporates an arrangement of tubular strutmembers, including a pair of horizontally disposed supporting plates 30upon which the base of the drum C is adapted to rest. The wheel mountalso includes main strut members 32 and 33 which are flxedly secured attheir outer ends to an axle 3| upon which the running wheels arerotatably mounted. At their inner ends, the strut members 32 and 33 areprovided with separable coupling devices for detachably engaging theinner ends of the said strut members with the rocker elements I0 and II, heretofore mentioned. As shown more particularly in Figure 6, therocker elements are provided with brackets 34, each bracket having anouter clevis portion 35 carrying a coupling pin 36 adjacent the endthereof, The inner end portions of the strut members 32 and 33 areformed with semi-spherical grooves 3'I adapted to be engaged by thecoupling pins 26.

To effect coupling engagementbetween the coupling pins 36 and the innerends of the strut members 32 and 33, I provide hook shaped lockingelements 38 which lockingly engage with the pins 36, as illustrated inthe full line position in Figure 6. These locking elements are pivotallymounted adjacent the ends of the strut members andare formed withclamping portions 39 adapted for being operatively engaged by springloaded sleeves 40 that are slidable upon the strut members and whichoperate to maintain said elements in locking position. By providing amounting arrangement for the wheels in the above described manner, thetruck may be readily collapsed as shown in Figure 5, so as to occupy a.minimum of space when not in use.

The backing plate I9, heretofore mentioned, has secured thereto ametallic strap, generally indicated by the numeral 4I, adapted for beingtightly strapped about the mid-portion of the drum to securely hold thedrum in servicing position upon the truck. Referring more particularlyto Figure 13, it will be noted that the free end of the one strapsection 40a is provided with a coupling member 42 which includes a baseportion 43 that is riveted or otherwise'xedly selaie'izesa cured to theouter free end of thesaid strapped section. 'Ihis base portion hasformed integrally gagement with the Acoupling member 42. This clampingmember includes a clamp base 48 that is riveted or otherwise iixedlysecured to the other free end ofthe strapped section 48h. The

end of the clamp base 48 is provided with a pair of spaced ears 49,interposed between which there is a clampl 50, the latter beingpivotally secured to said ears by means of a suitable hinge pin 58a.

'I'he clamp 50 is provided with a hook shaped clamping portion Iadjacent its pivoting end, adapted for engaging the loop member 46.'I'his clamping portion isv so disposed with respect to the pivoting endof theclamp that upon engagement of said loop in said clamping portion,the

ends of the strapped sections 48a and 40h4 respectively, are drawntoward one another and into intimate clamping engagement with the .wallsof the supply drum' to maintain said drum l 'immovable on the truckframe,

The'luid segregating and dispensing system hereinabove mentioned,comprises a fluid segregator, generally illustrated by the numeral 52,which is adapted to segregate fluids of heavier specic gravity fromiluids of lighter specific gravity, and fluid impelling means such as asuction pump indicated at 24, said uid segregator being interposedbetween the fuel supply drum C, preferably adjacent thereto, and thesuction pump 24, and being adapted to segregate the undesirable from thedesirable components prior to the pumping of the desirablecomponent'from the source of supplyto the point of delivery. Theimproved fluid segregator generally embodies those principles disclosedin my reissue United States Letters Patent, No. 19,227 granted to me onJune 26, 1934, and includes a container 53 having a iioat chamber 54, afloat 55 disposed within such chamber and a needle valve assembly,generally indicated by the numeral 56.

The container 53 is constructed of two separable sections 53a and53b,'the open meeting ends of which are formed with flanged portions 51and 58, said portions being`held together in united relationship bymeans of a split ring-shaped clamping' band 59. This clamping band,shown more particularly in Figure 8, is provided with a' .plurality of'radially, arranged, peripherally spaced clamping members l68, each beingprovided with a Wedge-shaped groove 6I adapted for embracing similarlyshaped shoulders formed on the anged portions of the separable sections.'Ihe extreme outer ends of the band 59 are suitably held together inclamping relationship by means of a clamping device, generally indicatedlby the numeral 62.

In accordance with the principles set forth in my above identifiedreissued patent, the oat 55 is slidably mounted upon a hollow guidemember 63 that is screwed into the bottom section 58h of the floatcontainer, and is constructed of two cylindrical sections 64 and 65having their open ends `ioined together preferably by brazing or weldingalong their abutting edges. The iloat maybe adjusted by a liquid ballastin substantially the same manner disclosed in my above referred toreissued patent, or in accordance with the teachings of my co-pendingapplication Serial No. 448,391, iiled April 29, 1930, wherein I havetaught of a new and novel method of adjusting a oat of this character,and to this extent reference' is made to my prior teachings as to thespecific methods and means. for eiecting such adjustment.

The needle valve assembly 56 comprisesr an upper needle valve 66 whichcooperates with a valve seat 61 formed in the upper end of the containersection 53a to control the ow of liquid l through the outlet of thefloat chamber, a lower needle valve 68 whichcooperates with a lowervalve seat member 69 provided inthe lower end -of the section 53h topermit segregation of the heavier liquid from the float chamber, andyieldable means, such for example as a coiled spring 1, which isoperatively connected to said upper and lower needle valves.

The needle valve assembly has a limited vertical floating movementrelative to the iloat, such movement being eiected by providing the stem1I of the lower needle valve with a laterally disposed pin 12 which isguided in oppositely disposed elongated slots 13 provided in a centralcollar 14 forming a part of the oat, said collar being adapted forslidable movement upon the float guide member `68. To permit the upperneedle valve 66 to be properly seated upon its valve seat 61, the upperend of the collar 14. is provided with an enlarged circular flangeportion 15 sufficiently large to permit vof a small amount ci sideclearance between the walls of the anges and the base diameter of theupper needle valve. In so doing, any slightV misalinement -between thevalve member 61 and the upper needle valve may be automaticallycorrected by a slight relative lateral motion between the upper needlevalve and the collar 14, and thereby eiect a proper seating of the saidvalve.

As shown in Figure 7, the upper section 53a of `the float container isprovided with a window 16 to permit visual inspection of the contents ofthe iioat chamber when so desired.

Since, as hereinabove stated.' it is desirable to segregate the heavierfluid from the lighter fluid after such fluid leaves the supply drum Cand before entering the pump 24, and to eiect an intermittent dischargeof the heavier liquid from the segregator unit, the base end of thelower section 53h is formed with a primary discharge outlet whichincorporates a series of intercommunicating passages 11a, 11b and 11e,the intermediate of which identified byl the numeral 11b, is providedwithaball check valve 18 which operates in a manner such as to permit ofa flow of liquid .therethrough from the iloat chamber but precated at89, which has mounted therein the discharge device hereinabovementioned. `This device comprises a housing 8l screwed into the open orthreaded end of the outlet 80, means being provided, such as a gasketGla, to effect a iiuidtight connection between the housing 8l and theupper end of the discharge outlet 00. This housing incorporates acentral bearing portion 82 in which is slidably arranged the stem of avalve 83.

the latter being adapted to engage a valve seat 84 which is associatedwith the outlet 80. The upper end of the housing 8| is provided with' achamber for receiving a spring 85 which surrounds the stem of the valve83, said spring bearing at its upper end against the bottom of the valve83 and at its lower end against the end wall of the chamber 85. Such anarrangement operates to normally maintain said valve in intimate seatingengagement with its valve seat 84. The stem 86 of the valve 83 extendsexteriorly of the housing 8| and has suitably attached thereto a footoperated lever 81, the inner end of which, indicated by the numeral 88,is formed with a camming portion 89 adaptedto bear against the outerface of the housing. Suitable fluid passageways 90 extend through thewalls of the housing 8| and communicate with the chamber outlet 80 topermit of a rapid drainage of the fluid therethrough upon depression ofthe valve 83 to its open position.

On its one side, the upper container section 53a is provided with aninlet passage 9| for the entering fluids, the walls of said passagebeing formed with a flanged portion 9.2 to which is connected thesimilarly flanged end of an adapter housing 93 provided with a couplingmember which latter is adapted for removable connection with the supplydrum.

As shown more particularly in Figure 7, the adapter 93 comprises a fluidpassageway 95 which communicates with a main chamber 96 formed in thebody of the adapter, the ends of said main 'chamber being suitablyapertured to provide oppositely disposed bearing portions for rotatablyreceiving therein a coupling member 91, provided with an outer threadedend to permit screwing the same into the end of the fluid drum. A gasket98 is suitably interposed between the outer walls of the chamber 96 andthe drum to provide a fluid tight joint therebetween.

The opposite end of the coupling member is formed with an outer flangedportion. A sealing gasket 99 is interposed between this flanged portionand the adjacent outer walls of the chamber 98 toprovide a fluid tightconnection. The coupling member 91 is maintainedin position within thechambered portions of the adapter by means of an annular ring which islixedly secured to the adapter and which engages the flanged portion ofthe coupling member 91 in such a manner as to permit rotational movementof the latter within said adapter housing but prevent linear .movementthereof.

It will be noted that I have provided an attaching wrench |0| on theouter end of the coupling member 91 to assist ln securing the saidmember to the fuel drum.

The adapter 93 is further provided with an integral upstanding sleeveportion |02 which extends into the interior of the main fluid receivingchamber 96. This sleeve portion serves as a guide for the couplingmember 91. It will also be noted that the intermediate portions of thewalls of this sleeve are sumcently enlarged to provide an air passageway|03 whichv extends about the coupling member and which communicates witha lateral port |04 provided in the end well of the adapter. This port isin operative communication with the air column in the rocker elements |0and heretofore mentioned.

The coupling member 91 `is provided with a centrally disposed stand-pipe|05, the upper end of which communicates with the fuel drum C. At itsopposite or inner end, the stand-pipe terminates in a transverse wall orpartition formed adjacent the base end of the coupling member. Suitablepassageway |06 and |01 effect communication between the standpipe andthe air passageways |03. A ball check valve |08 is positioned adjacentthe inner end of the stand-pipe, the purpose of which is to permit airto pass through the stand-pipe and into the fuel drum C but prevent anyuid passing therethrough.

The operation of this portion of the segregator unit hereinabovedescribed in detail, is as follows:

When it is desired to attach a truck and segregator unit to the supplydrum, the truck is inverted into the position indicated in Figure 1 andthereafter mounted upon the fuel drum, after which connection is madebetween the drum C and the segregator unit by threading the servicecoupling into the threaded opening provided in the fuel drum. Themounting or drum holding straps, heretofore mentioned, are thereaftertightly clamped about the mid-portion of the fuel drum. The truck, withthe drum so attached, is thereafter tumbled into the positionillustrated in Figure 2. In so doing, it will be noted that thesegregator unit is positioned at the bottom of the drum. Obviously withthe drum in the position indicated in Figure 2, it is essential that airbe admitted to the top of the drum. Since the stand-pipe |05, heretoforementioned, is in operative communication with the air column which ispresent in the rocker elements |0 and it will be obvious that such airwill readily pass through the stand-pipe |05 and rise through the liquidcontained within the drum through the medium of the air passageways |03,|06 and |01. With the liquid in the supply drum under atmosphericpressure, the fluid contained therein may be readily drained or pumpedto the segregator unit through the service coupling 81, into the mainchamber 96, and thence through the uid passageway 95 into the floatchamber of the segregator unit. Obviously the fluid in the supply drumis prevented from entering the passageways |06 and 01 by operation ofthe check valve |08.

As long as the fluid entering lthe oat chamber is of a desired specificgravity, the float will be in a position of rest at the bottom of thefloat chamber and the incoming liquid may be readily pumped into thepumping unit 24. If, however, the specific gravity of the incomingliquid corresponds to that for which the oat has been adjusted (which inthis instance is the undesirable or heavier component) the float, inresponding to such liquid, will rise within the float chamber and theupper needle valve 66 will be seated on its valve seat 61 and preventthe further passage of any liquid from the segregator unit. As long asthe oat is in its displaced upward position, the heavier liquid whichhas collected in the bottom of the float chamber may be readily drainedtherefrom through the passageways 11a, 11b and 11c. Should theaccumulation of the heavier liquid in the float chamber becomeexcessive, such excess of liquid may be more rapidly drained from thefloat chamber by depression of the valve 83 to an open position. Sinceit is desirable to segregate the heavier fluid from the lighter fluidafter such fluids leave the supply drum and before entering the suctionpump, the segregator must be rendered air tight to permit efficient andinstantaneous Withdrawal of the duid from the source of supply.

which is separated 35 by suitable power driven means.

Inasmuch as the fluid is pumped from the source of supply by suctionmeans, itis imperative that the vacuum in the float cha.nber bedestroyed when the pump is inoperative in order that the heavier fluidwhich accumulates in the float chamber may be gravity ,discharged ordrained therefrom. Accordingly the present invention includes means fornot only rendering the segregator fluid tight but additional means fordestroying the suction when the pump is inoperative. As shown moreparticularly in Figure 11, the suction pump 24 is operatively connectedto the upper outlet opening of the segregator by means of a flexiblerubber hose, indicated at ||0. 'Ihis suction pump comprises Aa casingformed with a main .pumping or suction chamber ||2 and an auxiliary orby-pass chamber ||3 from the main pumping chamber by an intervening wallbut in operative ,o communication therewith through the medium of anupper fluid passageway ||4 and a lower fluid passageway ||5.

'Ihe main pumping chamber ||2 incorporates a rotary pumping member ||6which is provided 9.5 with a drive shaft ||1 projecting through the'.casing on its one side, said shaft being adapted for receiving a handcrank ||8 to effect manual rotation of the said rotary member. Near itsouter end, the drive shaft has inserted there- 30 through a transversepin I9 adapted for being engaged by clutching dogs formed on the shaftengaging end of the handle.' At its extreme outer end, the crank isprovided with similarly arranged crank dogs adapted for being engagedIntermediate its outer end and the pin ||9 heretofore mentioned, thedrive shaft is formed with a periph--v eral groove |2|. The shaftengaging end of the crank I|8 is formed with a bearing portion |22 ainto which projects a locking lug |23 adapted for engaging in theperipheral groove I 2|, upon disengagement of the said crank with thedrive shaft pin. This locking lug is slidably mounted within the hollowshank portion |23 of the crank a and is backed up by a spring |24 whichoperates to cause the locking Vlug to be forced outwardly and into thepath of the groove |2| when the crank is moved longitudinally of thedrive shaft and thereby prevent accidental removal of the .o crank. Itis desirable however, that the crank be readily removable fromv thedrive shaft. 'Io -this end the locking lug |23 carries a transverse pin|25 which operates in suitable elongated openings |26 formed in the sidewalls of the ,u shank portion |23. The ends of the pin |25 eX- tendbeyond the walls of the shank portion a d istance suflicient to permitgrasping of the pin by the vlingers to thereby withdraw the locking lugfrom engagement with said yperipheral groove.

w The rotary pumping member IIS, heretofore mentioned, is positionedolf-center with respect to the center of the pumping chamber I I2 and isprovided with a plurality of radially arranged slots |21 having vanes|28 slidably mounted 65 therein, the outer ends of which are maintainedin intimate sliding engagement with the walls of the pumping chamber, sothat upon rotation of the said rotary member in a counterclockwisedirection, fluid is pumped from the source of 7.0 supply into saidpumping chamber through the intake port |29 and thence toward the pointo delivery through the exhaust port |30.

As shown in Figure 9, an auxiliary intake port I3| is formed in the pumpcasing adjacent the y primary intake port |29 to permit attachment ofThe by-pass chamber II2, heretofore men?- tioned, has positioned thereina float |32 provided at its upper end with a pin |33 which is guidedvertically in an opening |34 formed in the upper Wall of said chamber. Aneedle valve |35 is secured to the lower end of the float. This valve ispositioned in `a bored opening |36 provided in the upper end of a lowerbleeder valve member |31, the lower end of said opening being providedwith a. Valve seat, |38 against which the needle valve |35 is adapted toseat. The stem |39 of the bleeder valve member is provided withaplurality of uid orifices |40 which afportion and the outer wall ofsaid by-pass chamber fluid tight. The upper portion of the valve housingterminates in an inner sleeve portion |46 which is of reduced diameter,said sleeve portion being externally threaded and being adjustablelinearly relative to said valve housing. A coiled spring |48 issupported against movement at its lower end by the upper closed end of acollar |41, the upper end of said spring member bearing against the bodyof the Valve member |31.

It will also be noted that the collar |41 is provided on its one sidewith a keyway |48 which slidably engages a key |50 suitably positionedwithin the inner side wall of the opening |42. The foregoing arrangementis such as to permit of a relative linear adjustment between the collar`,ford communication between the opening |36 and The valve housing isfurther provided with an inner web portion |5| including an integralcentral threaded bearing portion I |52. A tubular member |53 is screwedinto this threaded portion and is adapted for being locked in any one ofa.v

number of adjusted positions by a lock nut indicated by the numeral |54.The stem |39of the bleeder valve member |31 is guided in its up and downmovement by this tubular member.

The valve housing at its outer end is hollow. said hollow portion beingprovided with internal threads adapted for receiving a bushing |55, theexposed outer end of which isprovided with a plurality of air openings|56. The inner end of this bushing is closed by an end plate |51 whichJis suitably rsecured thereto as by brazing, welding or the like, andprovided with a central opening into which the lower end pfthe tubularmember |53 is adapted to extend. A gasket |53, interposed between theend plate |51 and the web portion |5I, prevents air leaks upon` assemblyofv the bushing within the valve housing. Any suitable pressureresponsive element, such for example as a bellows |59, may bedisposedwithin 'carries an upright .plunger IBI that is arranged 75 for slidablemovement within the hollow stem |39 of the bleeder valve member |31.Under normal conditions, the upper or free end of the plunger IBI ispositioned in close proximity to, but spaced from, the tip end of theneedle valve |35.

Intermediate its ends, the tubular member |53 is provided with a collar|62 against which the inner end of a compression spring |63 is adaptedto bear, the outer end of said spring bearing against the base plate|60. From the foregoing 'detailed description, it Will be apparent thatby loosening the lock nut |54, the tubular member |53 may be adjustedlinearly along the stem of the bleeder valve member |31 and in so doing,the tension on the spring |63 may be increased or decreased and Ythuscontrol the contraction or expansion of the bellows. The web portion ofthe housing is suitably provided with a plurality of openings |64through which the 'liquid which is present in the by-pass chamber mayenter the bellows to subject the latter to such liquid pressure as maybe present in the said chamber.

'Ihe operation of the pump mechanism hereinabove described in detail isas follows:

When the segregating and pumping apparatus is initially installed upon afuel supply drum, the pumping unit will be void of any liquid. If thepump is thereafter operated, for the obvious purpose of pumping liquidfrom the drum to effect a discharge of the liquid at the point ofdelivery, the segregator and appurtenant mechanism must be rendered airtight to obtain instantaneous pumping action. 'I'he pumping unit beingvoid of any liquid, no liquid will be present in the by-pass chamber.Consequently, the iloat |32 will be in a position of rest in the lowerend of said by-pass chamber and the lower needle valve |35 will beseated against its valve seat |38 and prevent air from entering theintake end of the suction chamber ||2. Under these circumstances liquidmay be readily pumped from the source of supply through the segregatorunit and toward the point of delivery. Should operation of the pumpcontinue, and fuel discharging from the pump be prevented from issuingat the point of delivery, the incoming fluid will readily bleed aroundthe pump through the by-pass chamber 3 and the bleeder valve member.|31, it being understood that during this period of operation, thepressure of the liquid trap in the pump will automatically open thelower bleeder valve member |31 and permit circulation of the trap liquidaround the suction chamber and the by-pass chamber through the upper andlower uid passageways ||4 and H5.

Obviously when the suction andthe by-pass chambers of thepump are lledwith liquid, the float |32 will be displaced upwardly thus raising theneedle valve |35 from its seat |30. Under these circumstances, when apredeterminedlhead of the heavier liquid has accumulated in the oatchamber, to raise the iloat upwardly, there is available a continuouscolumn of liquid represented by the summation of those columns extendingfrom the point of delivery, through the by-pass chamber in the pump andthe connection between the pump and the segregator unit, to destroy thevacuum in the oat chamber and thereby eil'ect a rapid and gravitysegregation of the heavier liquid from the segregator float chamber.

The construction of the oat 55, heretofore mentioned, is such that underordinary circumstances a proper seating of the upper needle valve 66against its valve seat 61 should be obtained so that, when so seated,the pumping of any liquid from the float chamber into the pump, will beprevented. It is recognized, however, that situations may arise whereslight leakage of liquid, due to defective seating of the needle valveon the valve seat 61, may occur. Should such a condition arise, andshould the oat chamber under such circumstances, become completely lledwith the liquid of heavier specific gravity, there would result a slightdischarge of 'the heavier liquid from the segregator into the hoseconnection leading toward the pumping unit. Such a condition of affairsis to be highly avoided under any and all circumstances if the apparatusis to have its intended high degree of proficiency in the dispensing ofliquids having a predetermined or desired specific gravity. Such beingthe case, and in the event of faulty seating of the needle valve 66 inthe manner set forth herein- 20 above, when the needle valve 66 isseated, the suction effects in the suction chamber of the pumping unitwill be materially increased, such increase in pressure automaticallyoperating to eiect a partial collapse of the bellows |59. The bellows,in collapsing, will move the plunger |6| into contactual relationshipwith the tip end of the needle valve and will move the said valve awayfrom its seat |38. Immediately upon the happening of such a contingency,the pressure so drop at the intake of the pump will be diminished andconsequently prevent the undesirable heavier liquid that has leaked pastthe outlet passage of the segregator unit from reaching the pump.

As shown more particularly illustrated in Figure 15, the outlet passageof the pump is provided With a servicing hose |66 having at its outerend a. dispensing nozzle |61. This nozzle incorporates a springcontrolled, pressure-operated check valve |68 for controlling thepressure of the liquid to' be discharged therethrough. It will also benoted that this check valve is formed with a centrally disposed airorice |69 having a valve seat |10 which is controlled by a needle valve|1|, the 4,5 latter comprising a cylindrical body portion |12 that ismounted for slidable movement in a tubular member |13 carried by thecheck valve |68. This needle valve is backed up by a light spring |12awhich is moved into open or closed position, 50 depending upon therelative position of the dispensing nozzle. For example, if thedispensing end of the nozzle is uppermost, the valve 1| will be actuatedinto an open position by the atmospheric pressure which is acting uponit, it being understood that the spring |12a is under just a sufficienttension to normally maintain the needle valve 1| closed during operationof the pumping unit. Consequently, the static head of pressure of thecontinuous column of liquid extending from the point of delivery to thesegregator chamber, is immediately available to quickly destroy thevacuum in the iloat chamber and permit a gravity discharge of the liquidof heavier specific gravity from the oat chamber. When the position ofthe dispensing nozzle is reversed, a spring actuation of the needlevalve |1I into seated position on the valve seat |10 will be obtained soas to render the segregator and pumping unit air tight and permit oftheir sub- 70 sequent operation.

A modication of the nozzle arrangement is illustrated in Figure 1'1.This nozzle incorporates a body portion 215 which includes a chamber 216n which is conveniently positioned a primary 15 valve seat 211. A valve218 for the release of fluid from the nozzle is normally maintained inseated relationship on the valve seat 211 by means of a coil spring 219which surrounds the upper stem 280 of the said valve. The primary valve218 is formed with a lower stem 28| which passes through a stumng box282 provided in the .body portion 215 to prevent leakage of any liquidat the point where the lower stem passes through the housing.

The outer end of the lower stem 28| is adapted for being engaged by thefree end of a manually operated lever 283 which is pivotally mounted tothe housing by a clevis and pin arrangement, indicated at 284.

The upper stem .288 of the primary valve is tubular incross section andguided in its up and down movements upon the end of a valve guide member285 that is screwed into the upper end ofthe housing 215. The lower endof 'the valve guide is hollow to slidably receivetherein the upper endof a secondary valve. 28,6 which seats upon a 4valve seat 281 formed inthe lower ,valve stem 28|. This valve seat communicates with theatmosphere through the medium of a plurality of fluid passageways 288and with the inlet end of the housing by means of a uid orice 289. Thesecondary valve 286 is normally closed by means of a light weight springshown at 280.

From the foregoing detailed description of the modified nozzlearrangement, it will be apparent that as long as the nozzle is not usedin dispensing uid from the apparatus, the atmospheric pressure which isacting upon the secondary valve 286 willA open said valve against therelatively slight resistance offered by the sprngv298 to destroy theeiects of suction in the float chamber of the segregator and permit theliquid of heavier specific gravity'to be gravity segregated from thesegregator.

What I claim is:

1. A device of the character described, comprising, a normallyhorizontally disposed load supporting portion and a substantiallyvertically arranged rocker portion extending above and below the pointof support of said supporting portion, said rocker portion having a'curvature such that said device and the load to be carried therebyWillproduce moments of inertia of Vsufllcient magnitude, when the deviceand the load is tilted forward from an inverted position j through thecenter of balance, as to be capable of lifting said `load during therocking movement 'and bring the load into an elevated upright position.i

2. A device of the character described adapted to be detachablyconnected to a given load comprising, an upright rocking portion a'nd ahorizontal load supporting portion disposedin .substantial continuationof one another, said upright portion being provided with an arcuateground engaging surface so constructed and arranged as toenable saiddevice to rock through 3. A device of the character described, com-vprising, a normally horizontally disposed load supporting portion,having a wheel at the forward end thereof, and a substantiallyvertically arranged rocker portion extending 'above and below the pointof support of said supporting portion, said rocker portion extending asubstantial distance below the point of support for the load and havinga curvature such that said device and the load to be carried therebywill produce moments of inertia of suillcient magnitude, when the deviceand its load is tilted forward from an'inverted position through thecenter of balance, as toQbe capable of lifting said load during therocking movement and bring the load into an elevated upright position.A

4. A servicing apparatus of the character described comprising incombination, a rocker portion on which the truck` may rock fromsubstantially inverted position to substantially upright load carryingposition, a load supporting portion pivotally connectedy to ,said rockerportion and having a pair of wheels mounted thereon, and fluid impellingmeans for withdrawing the fluid from said container comprising a pumpcarried by said rocker portion and a segregator com inunicativelyconnected with said pump and adapted to be communicatively connectedwithsaid container and supported by said rocker portion. 4

5. A servicing apparatus of the character de- 'scribed comprising incombination, a rocker portionon which the truck may rock fromsubstantially inverted position to substantially upright load carryingposition,` a load supporting portion pivotally connected to said rockerprtion and having a pair of wheels mounted therel on, and iluidimpelling means for withdrawing the fluid from said container comprisinga pump carried by said rocker portion and a segregator communicativelyconnected with said pump and adapted to be communicatively connectedwith said container and supported by said rocker portion, saidsegregator being provided with means to permit the entry .of air intocontainer and .to prevent the escape of the uid from said containerthrough said means during the withdrawal of iluid therefrom. l

6. A device of the character described,v com prising, a normallyhorizontally disposed load supporting portion and a substantiallyvertically arranged rocker portion, said rocker .portion yhaving itsupper end at or near the upper end of the-load and its lowerendextending a substantial dista'nce below the point of support for theVload and having a curvature such that said de-E vice and a load to becarried thereby will produce moments of inertia ofsufcient magnitude,when the device andits load is tiltedk forward from an inverted positionthrough the center of balance as to be capable of lifting said loadduring the rocking movement and bringthe load into an elevated uprightposition.

7. A servicing apparatus of the'character de- "scribed, comprising inkcombination, a truck for supportingja liquid container includinga.vertical load engaging portion and a horizontal load engaging portion,Asaid vertical portions having a Uf-bend at the lower end thereofconstituting aground engaging` support for `the` rear end of said'truck,liquid impelling means adaptedftoy be Y posed at substantially rightangles to and having g its point of support positioned substantiallyabove the lower end of said rocker portion, said rocker portion having acurvature such as to produce a smooth curve of the center of gravitylocus substantially throughout the act of inversion and means mounted onsaid load carrying portion sufficiently forward of the center of gravityof said truck such that when said truck is rotated from an inverted'position into the load carrying position it will oppose the forces setup in said truck and prevent further rotation thereof.

9. A truck of the class described comprising a rocker portion normallyin contact with the ground, a load supporting portion normally disposedat substantially right angles to and having its point of supportpositioned substantially above the lower end of said rocker portion,said rocker portion having a curvature such as to produce a smooth curveof the center of' gravity locus substantially throughout the act ofinversion and a pair of wheels mounted on said load carrying portionsufliciently forward of the/center of gravity of said truck such thatwhen said truck is rotated from an inverted position into the loadcarrying position it will oppose the forces set up in said truck andprevent further rotation thereof.

10. A truck of the class described comprising a rocker portion, a loadsupporting portion normally disposed at substantially right angles toand constituting an extension of said rocker portion with the point ofsupport materially above the lower end of the rocker portion in thenormal position thereof and connected thereto in such a `manner as toenable said portions to be readily iolded together and a pair of wheelsmounted on said load carrying portion sufficiently forward of the centerof gravity of said truck such that when said truck is rotated into theload carrying position it will oppose the forces set up in said truckand prevent further rotation thereof.

11. A truck of the class described comprising a rocker portion, a loadsupporting truss frame normally disposed at substantially right anglesto and constituting an extension of said rocker portion with the pointof support materially above the lower end of the rocker portion in thenormal position thereof pivotally connected to said rocker portion atone point and releasably connected to said rocker portion at anotherpoint to enable said frame and rocker portion to be folded together, anda pair of wheels mounted on said frame and suillciently forward of thepoints of connection between said frame and said rocker portion toprevent rocking of Ksaid truck beyond the load carrying position.

12. A truck of the class described comprising a rocker portion, a loadsupporting portion normally disposed at substantially right angles toand constituting an extension of said rocker portion, said rockerportion having a curvature such as to produce a smooth curve of thecenter of gravity locus substantially throughout the act of inversionand means mounted on said load carrying portion sulciently forward ofthe center of gravity of said truck such that when said truck is rotatedinto the load carrying position it will oppose the forces set up in saidtruck and prevent further rotation thereof.

13. A truck of the class described comprising a rocker portion, a loadsupporting portion normally disposed at substantially right angles toand constituting an extension of said rocker portion said rocker portionhaving a curvature such as to produce a smooth curve of the center ofgravity locus substantially throughout the act of inversion and meansmounted on said load carrying portion suiilciently forward of the centerof gravity of said truck such that when said truck is rotated into theload carrying position it will oppose the forces set up in said truckand prevent further rotation thereof.

14. A truck of the class described comprising a rocker portion, a loadsupporting portion normally disposed at substantially right angles toand constituting an extension of said rocker portion, said rockerportion having a curvature such as to produce a smooth curve of thecenter of gravity locus substantially throughout the act of inversion,means mounted on said load carrying portion sufficiently forward of thecenter of gravity of said truck such that when said truck is rotatedinto the load carrying position it will oppose the forces set up in saidtruck and prevent further rotation thereof and a pair of handlesnormally disposed within the confines of said rocker portion and`extensible laterally therefrom.

15. A servicing apparatus of the character described, comprising incombination, a truck for supporting a sealed liquid container includinga vertical load engaging portion and a horizontal load engaging portion,and a liquid impelling means carried by said truck and adapted to becommunicatively connected with said container and having air intakemeans adapted to be communicatively connected with said container andwith said impelling means to enable the dispensing of fluid from saidcontainer.

16. A servicing apparatus of the character described, comprising incombination, a truck for supporting a sealed liquid container includinga vertical load engaging portion and a horizontal load engaging portion,and a liquid impelling means adapted to be communicatively connectedwith said container at the bottom thereof and 'a normally closed airintake means connecting said container with atmosphere thereat, saidvertical load engaging portion having a tubular frame element connectedwith said venting conduit.

17. A servicing apparatus of the character described, comprisingincombination, a truck for supporting a sealed liquid containerincluding a vertical load engaging portion and a horizontal loadengagingfportion, and a liquid impelling means supported by saidvertical load engaging

